DNS Record Lookup
Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain
Hosting & Network
cos.is runs on Akamai, with DNS by Akamai.
- Hosting network
- AkamaiAS20940Akamai
- Managed DNS
- Akamai
- None
- IPv6 (AAAA)
- Enabled
- CAA pinning
- None
Sits alongside 37,830 other sites on Akamai. Stable here since we started watching (Aug 24, 2026).
DNS Records for cos.is
| Hostname | Type | TTL | Priority | Content |
|---|---|---|---|---|
| cos.is | SOA | 3600 | a1-139.akam.net hostmaster.hm.com 2017061507 43200 3600 604800 3600 | |
| cos.is | AAAA | 0 | 2600:1408:ec00:21::1735:238f | |
| cos.is | AAAA | 0 | 2600:1408:ec00:21::1735:2385 | |
| cos.is | NS | 0 | a1-139.akam.net | |
| cos.is | NS | 0 | a12-67.akam.net | |
| cos.is | NS | 0 | a28-64.akam.net | |
| cos.is | NS | 0 | a11-66.akam.net | |
| cos.is | A | 0 | 23.218.216.218 | |
| cos.is | A | 0 | 23.218.216.203 | |
| www.cos.is | A | 0 | 23.212.248.197 | |
| www.cos.is | A | 0 | 23.212.248.212 | |
| www.cos.is | AAAA | 0 | 2600:1408:ec00:b::1730:cbab | |
| www.cos.is | AAAA | 0 | 2600:1408:ec00:b::1730:cbba |
Get alerted the moment cos.is's DNS changes
This page is today's snapshot. Turn on monitoring and we'll watch cos.is continuously, notifying you the moment anything moves across all three signals:
Uptime
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DNS changes
We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.
TLS certificate
We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.
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About DNS Records
DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:
- SOA (Start of Authority) - Contains administrative information about the zone
- NS (Nameserver) - Specifies authoritative nameservers for the domain
- A (Address) - Maps a domain to an IPv4 address
- AAAA - Maps a domain to an IPv6 address
- CNAME (Canonical Name) - Creates an alias pointing to another domain
- MX (Mail Exchange) - Specifies mail servers for the domain